On the Chrome team, we’ve been curious about the adoption of HTML5. We recently started measuring the usage of certain features in Google’s search index. Today, we’re excited to share a trend chart for element tag names:


Keep in mind that these numbers are only an approximation for the web as a whole because our crawler doesn’t index everything (for example, pages behind user login forms). Even so, the charts clearly demonstrate strong adoption trends for certain parts of HTML5:

* <header> and <footer> tags are now on 7%+ of the web.
* Usage of <nav>, <aside>, <section>, <article>, and <time> is steadily increasing too.

In the future, we hope to regularly share metrics on additional HTML5 features, so stay tuned!
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